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{-# LANGUAGE CPP, RecordWildCards, NamedFieldPuns #-}
#ifndef MIN_VERSION_Cabal
#define MIN_VERSION_Cabal(x,y,z) 0
#endif
#if MIN_VERSION_Cabal(2,0,0)
-- https://github.com/haskell/cabal/pull/4501 is upstream in 2.0, yey
import Distribution.Simple
main = defaultMain
#else
import Distribution.Simple
import Distribution.Simple.Utils
import Distribution.Simple.Setup
import Distribution.Simple.Install
import Distribution.Simple.Register
import Distribution.Simple.BuildPaths
import qualified Distribution.Simple.InstallDirs as ID
import Distribution.Simple.LocalBuildInfo
import Distribution.Simple.Program
import Distribution.PackageDescription
import Control.Applicative -- for GHC<7.10
import Control.Monad
import Data.List
import Data.Maybe
import System.FilePath
import System.Directory (renameFile)
main :: IO ()
main = defaultMainWithHooks $ simpleUserHooks {
instHook = inst,
copyHook = copy,
buildHook = \pd lbi hooks flags -> (buildHook simpleUserHooks) pd (patchLibexecdir lbi) hooks flags,
hookedPrograms = [ simpleProgram "cabal" ]
}
patchLibexecdir :: LocalBuildInfo -> LocalBuildInfo
patchLibexecdir lbi = let
idirtpl = installDirTemplates lbi
libexecdir' = toPathTemplate $ fromPathTemplate (libexecdir idirtpl) </> "$abi/$pkgid"
lbi' = lbi { installDirTemplates = idirtpl { libexecdir = libexecdir' } }
in
lbi'
-- mostly copypasta from 'defaultInstallHook'
inst ::
PackageDescription -> LocalBuildInfo -> UserHooks -> InstallFlags -> IO ()
inst pd lbi _uf ifl = do
let copyFlags = defaultCopyFlags {
copyDistPref = installDistPref ifl,
copyDest = toFlag NoCopyDest,
copyVerbosity = installVerbosity ifl
}
xInstallTarget pd lbi copyFlags (\pd' lbi' -> install pd' lbi' copyFlags)
let registerFlags = defaultRegisterFlags {
regDistPref = installDistPref ifl,
regInPlace = installInPlace ifl,
regPackageDB = installPackageDB ifl,
regVerbosity = installVerbosity ifl
}
when (hasLibs pd) $ register pd lbi registerFlags
copy :: PackageDescription -> LocalBuildInfo -> UserHooks -> CopyFlags -> IO ()
copy pd lbi _uh cf =
xInstallTarget pd lbi cf (\pd' lbi' -> install pd' lbi' cf)
xInstallTarget :: PackageDescription
-> LocalBuildInfo
-> CopyFlags
-> (PackageDescription -> LocalBuildInfo -> IO ())
-> IO ()
xInstallTarget pd lbi cf fn = do
let (extended, regular) = partition isExeScopePrivate (executables pd)
let pd_regular = pd { executables = regular }
_ <- flip mapM extended $ \exe -> do
let pd_extended = onlyExePackageDesc [exe] pd
fn pd_extended lbi
let lbi' = patchLibexecdir lbi
copydest = fromFlag (copyDest cf)
verbosity = fromFlag (copyVerbosity cf)
InstallDirs { bindir, libexecdir } = absoluteInstallDirs pd lbi' copydest
progprefix = substPathTemplate (packageId pd) lbi (progPrefix lbi)
progsuffix = substPathTemplate (packageId pd) lbi (progSuffix lbi)
fixedExeBaseName = progprefix ++ exeName exe ++ progsuffix
fixedExeFileName = bindir </> fixedExeBaseName <.> exeExtension
newExeFileName = libexecdir </> fixedExeBaseName <.> exeExtension
createDirectoryIfMissingVerbose verbosity True libexecdir
renameFile fixedExeFileName newExeFileName
fn pd_regular lbi
isExeScopePrivate :: Executable -> Bool
isExeScopePrivate exe =
fromMaybe False $ (=="private") <$> lookup "x-scope" fields
where
fields = customFieldsBI $ buildInfo exe
onlyExePackageDesc :: [Executable] -> PackageDescription -> PackageDescription
onlyExePackageDesc exes pd = emptyPackageDescription {
package = package pd
, executables = exes
}
#endif
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